"What we found, again and again, was that these patients were not treatment resistant in any meaningful psychiatric sense. Their brains were being starved of blood. The sympathetic system was failing to move blood upward, or the parasympathetic system was dilating vessels at exactly the wrong moment, or both. Once you measure the two branches independently and correct the specific imbalance, the so-called depression lifts, not because we treated depression, but because we treated the physiology that was masquerading as depression"

Nearly half of the study cohort (48.3 percent) had been diagnosed with long- or post-COVID syndrome, a population now recognized as a vast and troubled reservoir of autonomic dysfunction.

https://www.news-medical.net/news/20260331/Treating-autonomic-dysfunction-can-relieve-symptoms-of-treatment-resistant-depression.aspx

Treating autonomic dysfunction can relieve symptoms of treatment-resistant depression

Consider a house with the water main half shut. The faucets sputter. The toilet runs all night. The garden wilts. You could call a plumber for the faucet, a landscaper for the garden, a different plumber for the toilet, and every one of them would fix something while fixing nothing.

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"They arrived burdened not with one or two complaints but with an average of 23.2 out of 28 possible autonomic symptoms: fatigue so dense it felt architectural, brain fog that swallowed nouns mid-sentence, lightheadedness upon standing, sleep that never restored, memory lapses, gastrointestinal chaos, hormone dysregulation (especially in women's health), chronic pain, chronid headache or migraines, rashes, and sensory disturbances that made light too bright and sound too loud."